EP1390270B1 - Spritzgegossener behälter - Google Patents

Spritzgegossener behälter Download PDF

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Publication number
EP1390270B1
EP1390270B1 EP02727721A EP02727721A EP1390270B1 EP 1390270 B1 EP1390270 B1 EP 1390270B1 EP 02727721 A EP02727721 A EP 02727721A EP 02727721 A EP02727721 A EP 02727721A EP 1390270 B1 EP1390270 B1 EP 1390270B1
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EP
European Patent Office
Prior art keywords
water
polymer
rigid
soluble
poly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Revoked
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EP02727721A
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English (en)
French (fr)
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EP1390270A1 (de
Inventor
Daniele Benckiser Produktions GmbH FREGONESE
Marcus Guzmann
Ralf Benckiser Produktions GmbH WIEDEMANN
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Reckitt Benckiser UK Ltd
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Reckitt Benckiser UK Ltd
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Application filed by Reckitt Benckiser UK Ltd filed Critical Reckitt Benckiser UK Ltd
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/04—Detergent materials or soaps characterised by their shape or physical properties combined with or containing other objects
    • C11D17/041—Compositions releasably affixed on a substrate or incorporated into a dispensing means
    • C11D17/042—Water soluble or water disintegrable containers or substrates containing cleaning compositions or additives for cleaning compositions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
    • B65D81/3876—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation insulating sleeves or jackets for cans, bottles, barrels, etc.
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0059—Degradable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages

Definitions

  • the present invention relates to rigid, water-soluble containers, in particular to such containers that may be utilised for the delivery into an aqueous environment of a fabric care, surface care or dishwashing composition.
  • Clothes washing compositions may be delivered to a clothes washing machine by a delivery tray from which the composition is fed into the washing drum, or they may be placed directly into the washing drum.
  • the washing compositions may be in powder, liquid or block form.
  • Liquid compositions have the disadvantage that they may be spilt. The same applies to powder compositions.
  • Powder compositions have the additional disadvantage that they may produce dust which can be inhaled. These problems are overcome or lessened when blocks of washing composition are used. These are normally individually wrapped. On unwrapping a block, for use, it is still possible that some dust may be produced. Additionally it is an inconvenience for the consumer to have to unwrap the block.
  • compositions contain enzymes to assist the cleaning action. Even though the user may tolerate enzyme residues which may be left in clothes after washing, they may still not tolerate contact between the concentrated washing composition containing the enzymes, and the skin.
  • WO 89/12587 discloses a package which comprises an envelope of a water-soluble or water-dispersible material which comprises a flexible wall and a water-soluble or water-dispersible heat seal.
  • the package may contain an organic liquid comprising, for example, a pesticide, fungicide, insecticide or herbicide.
  • CA-A-1, 112, 534 discloses a packet made of a water-soluble material in film form enclosing within it a paste-form, automatic dishwasher-compatible detergent composition.
  • the water-soluble material may be, for example, poly(vinyl alcohol), polyethylene oxide or methyl cellulose.
  • WO 92/17382 discloses a package containing an agrochemical such as a pesticide comprising a first sheet of nonplanar water-soluble or water-dispersible material and a second sheet of water-soluble or water-dispersible material superposed on the first sheet and sealed to it by a continuous closed water-soluble or water-dispersible seal along a continuous region of the superposed sheets.
  • an agrochemical such as a pesticide
  • the first disadvantage is that they do not have a particularly attractive appearance. In fields such as containers used in the domestic environment, an attractive appearance for an article is extremely desirable. Liquids contained in envelopes of water-soluble film can have a limp, unattractive appearance.
  • the second disadvantage is that it is difficult to form two or more separate compartments in the packaging so that two incompatible components are both enclosed but separated from each other.
  • the third disadvantage is that there is only limited control of the release profile of the compositions held in the containers.
  • the composition is simply released at the time when the films dissolve or disperse in water. While it may be possible to control to a certain extent the timing of the start of release of the contents, there can be no control over the rate of release of the contents since the entire film dissolves or disperses at about the same time. Furthermore it can be difficult to provide an extended time before the contents of the package are released.
  • An additional problem also arises with thermoformed packages. If the thermoforming is not carefully controlled there may be inadvertent thinning of the film material at the points where the material is drawn down into the mould when it is thermoformed. This could release the contents of the package early. Additionally, in all of the above packages, it is not possible to release different compositions at different times or at different rates since, as discussed above, it is not possible to incorporate more than one composition in each water-soluble container.
  • the fourth disadvantage is that the containers cannot be produced at a particularly fast rate.
  • the containers are produced by heat-sealing planar films or by thermoforming, the containers have to be immediately filled and sealed. All of these procedures have to be carried out in succession. This means that it is not possible to obtain a quick throughput for mass-market goods such as household products. For example, standard thermoforming machines can only produce around 400 to 800 containers per minute.
  • the present invention seeks to provide water-soluble containers which overcome some or all of the above disadvantages.
  • a rigid, water-soluble container made entirely or in part of an injection moulded water-soluble polymer, which polymer when dissolved in water is active in detergency, in which container is present a fabric care, surface care or dishwashing composition, provided that the polymer is not poly (vinyl alcohol).
  • active in detergency we mean that the polymer can aid the efficiency of the fabric care, surface care or dishwashing composition.
  • a polymer which is active in detergency is a water softening polymer or a dye transfer inhibitor polymer.
  • Specific polymers which are preferred are polyvinylpyrrolidine, polyacrylic acid or an ester thereof, polymaleic acid or an ester thereof, or a copolymer of any thereof.
  • the polymer To be active in detergency the polymer must be present in the wash in sufficient quantities to produce the required effect.
  • an injection moulded container containing a fabric cleaning composition should contain at least 0.2grams of PVP, ideally at least 0.4grams.
  • the use of poly(acrylic acid) or poly(maleic acid) or an ester of either thereof of a copolymer of any thereof in an injection moulded container containing a fabric cleaning composition should contain at least 2 grams of the polymer to provide adequate water softening. It will be appreciated that not all of the amount of the polymer need be present in the container, a percentage of the polymer may be present inside the container, preferably less than 70%wt, ideally less than 50%wt. For other polymers which are active in detergency it is a simple process to determine the amount of polymer needed.
  • a further feature of the invention is a rigid, water-soluble container made of at least two injection moulded polymers, a "first" water-soluble polymer, preferably selected from poly(vinyl alcohol) ; a cellulose derivative (such as an ether or hydroxypropyl methyl cellulose) ; and poly(glycolide), poly(glycolic acid), poly(lactides), poly (lactic acid) or a copolymer thereof; and a "second" water-soluble polymer which polymer when dissolved in water is active in detergency.
  • a first water-soluble polymer preferably selected from poly(vinyl alcohol) ; a cellulose derivative (such as an ether or hydroxypropyl methyl cellulose) ; and poly(glycolide), poly(glycolic acid), poly(lactides), poly (lactic acid) or a copolymer thereof; and a "second" water-soluble polymer which polymer when dissolved in water is active in detergency.
  • the present invention further provides a method of ware washing, comprising use of a container, as defined above, the method comprising introducing the container into a ware washing machine prior to commencement of the washing process, the container being entirely consumed during the washing process.
  • the ware washing machine may, for example, be a dishwashing or laundry washing machine.
  • the containers of the present invention overcome some or all of the above disadvantages.
  • the containers are rigid and self-supporting, they have an attractive, uniform appearance which does not vary between different containers.
  • a wide variety of different shapes and designs are available.
  • the rigid containers can easily have various elements incorporated which are considered to be pleasing to the eye but which are impossible to incorporate in the flexible containers discussed above.
  • the containers are rigid, it is easily possible to introduce two or more compartments, or have larger compartments separated by walls, to separate mutually incompatible ingredients.
  • the containers can also hold part of the composition on an external surface, for example in an indentation.
  • the container can be moulded is almost any shape that might be useful. In particular it can be given raised or lowered areas.
  • the container Since the container is rigid, it is possible to adapt the width of all of the walls of the container to control both the start of release of the composition as well as the rate of release.
  • one or more walls may be made thin in order to have an early release of the composition.
  • all the walls may be thick in order to ensure that there is a delayed release of the composition.
  • the rate of release of the composition may also be controlled by ensuring that only part of the container has thin walls which are dissolved or dispersed before the remainder of the container.
  • Different walls or parts of walls of the container may be prepared from different water-soluble polymers which have different dissolution characteristics.
  • a first compartment may be fully enclosed by a polymer which dissolves at a higher or lower temperature than the polymer enclosing a second compartment.
  • a polymer which dissolves at a higher or lower temperature than the polymer enclosing a second compartment.
  • different components can be released at different times. If the container holds a solid or gelled composition, it is not even necessary for the container to fully enclose the composition. A part may be left exposed, so that it immediately begins to dissolve when added to water.
  • the containers are rigid and self-supporting, they can easily be filled on a production line using normal filling equipment.
  • Such filling equipment is quite capable of filling at least 1500 containers per minute.
  • the containers as described provide added efficiency to the compositions contained therein by themselves being active in detergency.
  • the container apart from its contents, consists essentially of the injection-moulded polymer or polymers.
  • Plasticizers are generally used in an amount of up to 20 wt%, for example from 15 to 20 wt%
  • lubricants are generally used in an amount of 0.5 to 5% wt% and the polymer is generally therefore used in an amount of 75 to 84.5 wt%, based on the total amount of the moulding composition.
  • the container is generally cold water (20°C) soluble, but may be insoluble in cold water at 20°C and only become soluble in warm water or hot water having a temperature of, for example, 30°C, 40°C, 50°C or even 60°C.
  • containers soluble in aqueous environments at temperatures as low as 5°C are also desirable.
  • plasticizers and mould release agents are, for example, pentaerthyritol such as depentaerythritol, sorbitol, mannitol, glycerine and glycols such as glycerol, ethylene glycol and polyethylene glycol.
  • Solids such as talc, stearic acid, magnesium stearate, silicon dioxide, zinc stearate, and colloidal silica may also be used.
  • Poly(vinylpyrollidone) may be moulded at temperatures of from 120-180°C, depending upon the formulation selected and the melt flow index required.
  • Poly(acrylic acid) may be moulded at temperatures of from 180-220°C, for example, depending upon the formulation selected and the melt flow index required.
  • Poly(maleic acid) may be moulded at temperatures of, from 180-220°C for example, depending upon the formulation selected and the melt flow index required.
  • the PVOH when used as a second polymer in the container, may be moulded at temperatures of, for example, from 180-220°C, depending upon the formulation selected and the melt flow index required.
  • a preferred PVOH which is already in a form suitable for injection moulding is sold in the form of granules under the name CP1210T05 by Soltec Development SA of Paris, France.
  • the PVOH preferably used to form the container of the present invention may be partially or fully alcoholised or hydrolysed. For example it may be from 40-100%, preferably 70-92 %, more preferably about 88%, alcoholised or hydrolysed polyvinylacetate.
  • the container is a container enclosing a washing composition.
  • All of the polymer compositions may also include other components such as colouring agents and components which modify their properties.
  • Injection moulding techniques are well known to the skilled person and are well described in the literature (see, for example a good summary is provided in "The Wiley Encyclopedia of Packaging Technology” Wiley Interscience 1986). Special techniques, described below, are preferred features of the invention for producing containers having more than one type of polymer.
  • Multi-component injection moulding covers two distinct processes
  • Steps A) and B) may be repeated more than once and may be combined. It will be appreciated by the skilled person that the first injection moulded polymer must survive the pressure and temperature conditions of the second, or subsequent, injection moulding.
  • the first polymer or molten mix may be prevented from entering parts of the mould by any physical means, such as, gates, gravity, positive or negative pressure.
  • Sandwich injection moulding (or sometimes called skin-core injection moulding) comprises injection moulding a polymer or molten polymer mix into a mould until it is partially filled and then injecting a second polymer or molten polymer mix into the same mould through the same gate to form the core. An additional step of sealing the core may be performed.
  • a further technique that can be used is to coat part or the entire container, the container being moulded from any water-soluble polymer, with a polymer which is active in detergency, provided that the polymer is not poly (vinyl alcohol). Coating may be achieved by dipping the container into a solution of polymer or in molten polymer or by spray coating of a solution of polymer or molten polymer. It will be appreciated that polymers that are active in detergency but which cannot be injection moulded can be used, preferably, PVNO.
  • the container generally comprises a water-soluble receptacle part which holds the composition and a water-soluble closure part, which may simply close the receptacle part or may itself have at least some receptacle function.
  • the receptacle part preferably has side walls which terminate at their upper end in an outward flange in which the closure part is sealingly secured, especially if the closure part is in the form of a film.
  • the closure part is joined to the receptacle part directly by means of a hinge part, preferably the receptacle, closure and hinge part are caste in a single mould.
  • the securement may be by means of an adhesive but is preferably achieved by means of a seal, between the flange and the closure part.
  • the receptacle part is connected to the closure part via a hinge part thus forming a single article which is easily sealed.
  • Heat sealing may be used or other methods such as infra-red, radio frequency, ultrasonic, laser, solvent, vibration or spin welding.
  • An adhesive such as an aqueous solution of PVOH or a cellulose ether may also be used.
  • the seal is desirably also water-soluble.
  • the closure part may itself be injection moulded or blow moulded. Preferably, however, it is a plastics film secured over the receptacle part.
  • the film may, for example, comprise PVOH or a cellulose ether such as HPMC or another water-soluble polymer.
  • the receptacle part may define two or more compartments and at least one compartment is made entirely or in part of a water-soluble polymer which when dissolved in water is active in detergency.
  • the container walls have thicknesses such that the containers are rigid.
  • the outside walls and any inside walls which have been injection moulded independently have a thickness of greater than 100 ⁇ m, for example greater than 150 ⁇ m or greater than 200 ⁇ m, 300 ⁇ m, or 500 ⁇ m, 750 ⁇ m or 1mm.
  • the closure part is of a thinner material than the receptacle part. If different compartments having different dissolution times are required, different wall thicknesses can be used. A thickness difference of from 100 ⁇ m to 500 ⁇ m, preferably from 250 ⁇ m to 350m, would give a suitable difference in release times.
  • the closure part dissolves in water (at least to the extent of allowing the washing composition in the receptacle part to be dissolved by the water; and preferably completely) at 40°C in less than 5 minutes, preferably in less than 2 minutes.
  • the receptacle part and the closure part could be of the same thickness or different thicknesses.
  • the closure part may, for example, be of higher solubility than the receptacle part, in order to dissolve more quickly.
  • a rigid, water-soluble container made entirely or in part of an injection moulded water-soluble polymer, in which container is present a fabric care, surface care or dishwashing composition and has bound to the inside or outside of the container or encased within the container a second polymer which polymer when dissolved in water is active in detergency.
  • the second polymer is polyvinylpyrrolidine, polyacrylic and or an ester thereof, polymaleic acid or an ester thereof, or a copolymer of any thereof.
  • the second polymer may be in the form of a shaped article, such as a ball, rod, or as a sheet. When attached to the outside or inside of the container the second polymer can be added to the mould prior to injection moulding.
  • the container is made entirely or in part of poly (vinyl alcohol) in the above preferred feature
  • the washing container is generally cuboid in its external shape, with the top wall being formed by the closure part, and with the side walls and base wall being formed by the receptacle part.
  • a washing container of the invention is manufactured by forming an array of receptacle parts, each receptacle part being joined to adjacent receptacle parts, and being separable from them by a snap or tear action.
  • the array is preferably one which has columns and rows of the receptacle parts.
  • the receptacle parts may be separated by frangible webs of the water-soluble polymer such as PVOH or a cellulose ether.
  • the receptacle parts may be manufactured with the aforementioned flanges, such that they are separated from each other by a line of weakness.
  • the material may be thinner, and so able to be broken or torn readily.
  • the thinness may be a result of the moulding process or, preferably, of a later scoring step.
  • the array formed by injection moulding, is fed to a filling zone, and all the receptacle parts are charged with the washing composition.
  • a sheet of a water-soluble polymer such as PVOH or a cellulose ether may then be secured over the top of the array, to form the closure parts for all the receptacle parts of the array.
  • the array may then be split up into the individual washing capsules, prior to packaging, or it may be left as an array, for packaging, to be split by the user. Preferably, it is left as an array, for the user to break or tear off the individual washing capsules.
  • the array has a line of symmetry extending between capsules, and the two halves of the array are folded together, about that line of symmetry, so that closure parts are in face-to-face contact.
  • This helps to protect the closure parts from any damage, between factory and user. It will be appreciated that the closure parts are more prone to damage than the receptacle parts.
  • two identical arrays of washing capsules may be placed together with their closure parts in face-to-face contact, for packaging.
  • the container, capsule or receptacle part may define a single compartment.
  • the container, capsule or receptacle part may define two or more compartments, which contain different products useful in a washing process.
  • a dividing wall or walls of the compartments preferably terminate at the top of the container, i.e. in the same plane as the top edges of the side walls, so that when the receptacle part is closed by the closure part the contents of the compartments cannot mix.
  • the container may be provided with an upstand, preferably spaced from the side walls thereof, and preferably of generally cylindrical shape. If wished, the remaining volume of the container can be divided into two or more parts by means of walls extending between the upstand and the side walls.
  • the container may be formed with an opening, for example a depression, formed in the side wall or the base wall, and preferably being open in the outward direction. That is to say, it preferably does not form part of the main volume defined by the container.
  • the opening is adapted to receive, in a press-fit manner, a solid block (for example a tablet) of a composition, for example a material useful in a washing process.
  • the closure part is of a transparent or translucent material, so that the contents of the washing capsule can be seen.
  • the container is of a transparent or translucent material, so that the contents of the washing capsule can be seen.
  • the washing composition within the container, or within a compartment thereof, need not be uniform.
  • a settable agent for example a gel, useful in a washing process, and then with a different material.
  • the first material could dissolve slowly in the washing process so as to deliver its charge over a long period within the washing process. This might be useful, for example, to provide immediate, delayed or sustained delivery of a softening agent in a clothes washing container.
  • the container may, for example, be in at least two parts (a body part and a cap part) which fit tightly, and preferably sealingly and inseparably, together to form a compartment in which is stored the ingredient to be achieved.
  • the container or capsule may have three parts - a body such as a receptacle, a first cap, and then a second cap to fit over the closed end of either the body or the first cap, so as to result in a capsule with two separate compartments. Where there are three such parts (or more; four parts - a body and three caps - make three compartments, and so on), then naturally the ingredients in each compartment may be the same or they may be different.
  • one compartment may contain, for example, a liquid or solid component (such as a powder, granules or a compressed or gelled tablet) and another may contain a different liquid or solid component (such as a powder, granules or a compressed or gelled tablet).
  • a compartment may contain a solid component, for example in the form of a ball or pill (such as a powder, granules or a compressed or gelled tablet), and a liquid component.
  • the composition has a mass of at least 10 g or 15 g, for example, from 10 g or 15 g to 100 g, especially from 10 g to 15 g to 40 g.
  • a dishwashing composition may weigh from 10 g or 15 g to 20 g
  • a water-softening composition may weigh from 25 g to 35 g
  • a laundry composition may weigh from 10 g to 40 g, 20 g to 40 g or 30 g to 40 g.
  • a cuboid container may have a length of 1 to 5 cm, especially 3.5 to 4.5 cm, a width of 1.5 to 3.5 cm, especially 2 to 3 cm, and a height of 1 to 2 cm, especially 1.25 to 1.75 cm.
  • the composition may comprise a powder, gel, paste or low water liquid foundation.
  • the composition contained by the container may be, for example, any which is suitable for the designated application, for example a clothes washing or dishwashing application. It may be a powder or a liquid but if a liquid, may be a low water formulation, preferably having a maximum water content of 5 wt%, in order to maintain the integrity of the walls of the capsule or a higher water formulation containing, for example, at least 8 wt% water. It will be appreciated that higher water contents may be present where the water is chemically or physically bound.
  • the composition may be formulated having regard to the fact that the user will not come into contact with the composition, whether by inhalation or by skin contact.
  • the composition may include an enzyme, without concern about physical contact between the composition containing the enzyme, and the user.
  • the container contains an aqueous liquid having a relatively high free water content, it may be necessary to take steps to ensure the liquid does not attack the water-soluble polymer if it is soluble in cold water (20°C) , or water at a temperature of up to, say, 35°C. Steps may be taken to treat the inside surfaces of the container, for example by coating it with agents such as PVdC (poly(vinylidene chloride))or PTFE (polytetrafluoroethylene), or to adapt the composition to ensure that it does not dissolve the polymer. For example, it has been found that ensuring the composition has a high ionic strength or contains an agent which minimises water loss through the walls of the container will prevent the composition from dissolving the polymer from the inside. This is described in more detail in EP-A-518,689 and WO 97/27743.
  • composition held within the container depends, of course, on the intended use of the composition. It may, for example, contain surface active agents such as an anionic, non-ionic, cationic, amphoteric or zwitterionic surface active agent or mixture thereof.
  • surface active agents such as an anionic, non-ionic, cationic, amphoteric or zwitterionic surface active agent or mixture thereof.
  • anionic surfactants are straight-chained or branched alkyl sulfates and alkyl polyalkoxylated sulfates, also known as alkyl ether sulfates. Such surfactants may be produced by the sulfation of higher C 8 -C 20 fatty alcohols.
  • Examples of primary alkyl sulfate surfactants are those of formula: ROSO 3 - M + wherein R is a linear C 8 -C 20 hydrocarbyl group and M is a water-solubilising cation.
  • R is C 10 -C 16 alkyl, for example C 12 -C 14
  • M is alkali metal such as lithium, sodium or potassium.
  • secondary alkyl sulfate surfactants are those which have the sulfate moiety on a "backbone" of the molecule, for example those of formula: CH 3 (CH 2 ) n (CHOSO 3 - M + ) (CH 2 ) m CH 3 wherein m and n are independently 2 or more, the sum of m+n typically being 6 to 20, for example 9 to 15, and M is a water-solubilising cation such as lithium, sodium or potassium.
  • Especially preferred secondary alkyl sulfates are the (2,3) alkyl sulfate surfactants of formulae: CH 3 (CH 2 ) x (CHOSO 3 - M + )CH 3 and CH 3 (CH 2 ) x (CHOSO 3 - M + )CH 2 CH 3 for the 2-sulfate and 3-sulfate, respectively.
  • x is at least 4, for example 6 to 20, preferably 10 to 16.
  • M is cation, such as an alkali metal, for example lithium, sodium or potassium.
  • alkoxylated alkyl sulfates are ethoxylated alkyl sulfates of the formula: RO(C 2 H 4 O) n SO 3 - M + wherein R is a C 8 -C 20 alkyl group, preferably C 10 -C 18 such as a C 12 -C 16 , n is at least 1, for example from 1 to 20, preferably 1 to 15, especially 1 to 6, and M is a salt-forming cation such as lithium, sodium, potassium, ammonium, alkylammonium or alkanolammonium. These compounds can provide especially desirable fabric cleaning performance benefits when used in combination with alkyl sulfates.
  • alkyl sulfates and alkyl ether sulfates will generally be used in the form of mixtures comprising varying alkyl chain lengths and, if present, varying degrees of alkoxylation.
  • anionic surfactants which may be employed are salts of fatty acids, for example C 8 -C 18 fatty acids, especially the sodium or potassium salts, and alkyl, for example C 8- C 18 , benzene sulfonates.
  • nonionic surfactants are fatty acid alkoxylates, such as fatty acid ethoxylates, especially those of formula: R (C 2 H 4 O) n OH wherein R is a straight or branched C 8 -C 16 alkyl group, preferably a C 9 -C 15 , for example C 10 -C 14 , alkyl group and n is at least 1, for example from 1 to 16, preferably 2 to 12, more preferably 3 to 10.
  • the alkoxylated fatty alcohol nonionic surfactant will frequently have a hydrophilic-lipophilic balance (HLB) which ranges from 3 to 17, more preferably from 6 to 15, most preferably from 10 to 15.
  • HLB hydrophilic-lipophilic balance
  • fatty alcohol ethoxylates are those made from alcohols of 12 to 15 carbon atoms and which contain about 7 moles of ethylene oxide. Such materials are commercially marketed under the trademarks Neodol 25-7 and Neodol 23-6.5 by Shell Chemical Company.
  • Other useful Neodols include Neodol 1-5, an ethoxylated fatty alcohol averaging 11 carbon atoms in its alkyl chain with about 5 moles of ethylene oxide; Neodol 23-9, an ethoxylated primary C 12 -C 13 alcohol having about 9 moles of ethylene oxide; and Neodol 91-10, an ethoxylated C 9 -C 11 primary alcohol having about 10 moles of ethylene oxide.
  • Dobanol 91-5 is an ethoxylated C 9 -C 11 fatty alcohol with an average of 5 moles ethylene oxide
  • Dobanol 25-7 is an ethoxylated C 12 -C 15 fatty alcohol with an average of 7 moles of ethylene oxide per mole of fatty alcohol.
  • Suitable ethoxylated alcohol nonionic surfactants include Tergitol 15-S-7 and Tergitol 15-S-9, both of which are linear secondary alcohol ethoxylates available from Union Carbide Corporation.
  • Tergitol 15-S-7 is a mixed ethoxylated product of a C 11 -C 15 linear secondary alkanol with 7 moles of ethylene oxide and Tergitol 15-S-9 is the same but with 9 moles of ethylene oxide.
  • Neodol 45-11 is a similar ethylene oxide condensation products of a fatty alcohol having 14-15 carbon atoms and the number of ethylene oxide groups per mole being about 11. Such products are also available from Shell Chemical Company.
  • nonionic surfactants are, for example, C 10 -C 18 alkyl polyglycosides, such s C 12 -C 16 alkyl polyglycosides, especially the polyglucosides. These are especially useful when high foaming compositions are desired.
  • Further surfactants are polyhydroxy fatty acid amides, such as C 10 -C 18 N-(3-methoxypropyl) glycamides and ethylene oxide-propylene oxide block polymers of the Pluronic type.
  • cationic surfactants are those of the quaternary ammonium type.
  • the total content of surfactants in the composition is desirably 60 to 95 wt%, especially 75 to 90 wt%.
  • an anionic surfactant is present in an amount of 50 to 75 wt%
  • the nonionic surfactant is present in an amount of 5 to 50 wt%
  • the cationic surfactant is present in an amount of from 0 to 20 wt%.
  • the amounts are based on the total solids content of the composition, i.e. excluding any solvent which may be present.
  • compositions may also independently comprise enzymes, such as protease, lipase, amylase, cellulase and peroxidase enzymes.
  • enzymes such as protease, lipase, amylase, cellulase and peroxidase enzymes.
  • Such enzymes are commercially available and sold, for example, under the registered trade marks Esperase, Alcalase and Savinase by Nova Industries A/S and Maxatase by International Biosynthetics, Inc.
  • the enzymes are independently present in the compositions in an amount of from 0.5 to 3 wt%, especially 1 to 2 wt%, when added as commercial preparations they are not pure and this represents an equivalent amount of 0.005 to 0.5 wt% of pure enzyme.
  • compositions may, if desired, independently comprise a thickening agent or gelling agent.
  • suitable thickeners are polyacrylate polymers such as those sold under the trade mark CARBOPOL, or the trade mark ACUSOL by Rohm and Haas Company.
  • Other suitable thickeners are xanthan gums.
  • the thickener if present, is generally present in an amount of from 0.2 to 4 wt%, especially 0.5 to 2 wt%.
  • compositions used in dishwashing independently usually comprise a detergency builder.
  • the builders counteract the effects of calcium, or other ion, water hardness.
  • examples of such materials are citrate, succinate, malonate, carboxymethyl succinate, carboxylate, polycarboxylate and polyacetyl carboxylate salts, for example with alkali metal or alkaline earth metal cations, or the corresponding free acids.
  • Specific examples are sodium, potassium and lithium salts of oxydisuccinic acid, mellitic acid, benzene polycarboxylic acids, C 10 -C 22 fatty acids and citric acid.
  • organic phosphonate type sequestering agents such as those sold by Monsanto under the trade mark Dequest and alkylhydroxy phosphonates. Citrate salts and C 12 -C 18 fatty acid soaps are preferred.
  • Further builders are; phosphates such as sodium, potassium or ammoniutri salts of mono-, di- or tri-poly or oligo-phosphates; zeolites; silicates, amorphous or structured, such as sodium, potassium or ammonium salts.
  • Suitable builders are polymers and copolymers known to have builder properties.
  • such materials include appropriate polyacrylic acid, polymaleic acid, and polyacrylic/polymaleic and copolymers and their salts, such as those sold by BASF under the trade mark Sokalan.
  • the builder is desirably present in an amount of up to 90 wt%, preferably 15 to 90 wt%, more preferable 15 to 75 wt%, relative to the total weight of the composition. Further details of suitable components are given in, for example, EP-A-694,059, EP-A-518,720 and WO 99/06522.
  • compositions can also optionally comprise one or more additional ingredients.
  • additional ingredients include conventional detergent composition components such as further surfactants, bleaches, bleach enhancing agents, builders, suds boosters or suds suppressors, anti-tarnish and anticorrosion agents, organic solvents, co-solvents, phase stabilisers, emulsifying agents, preservatives, soil suspending agents, soil release agents, germicides, pH adjusting agents or buffers, non-builder alkalinity sources, chelating agents, clays such as smectite clays, enzyme stabilizers, anti-limescale agents, colourants, dyes, hydrotropes, dye transfer inhibiting agents, brighteners, and perfumes. If used, such optional ingredients will generally constitute no more than 10 wt%, for example from 1 to 6 wt%, the total weight of the compositions.
  • compositions which comprise an enzyme may optionally contain materials which maintain the stability of the enzyme.
  • enzyme stabilizers include, for example, polyols such as propylene glycol, boric acid and borax. Combinations of these enzyme stabilizers may also be employed. If utilized, the enzyme stabilizers generally constitute from 0.1 to 1 wt% of the compositions.
  • compositions may optionally comprise materials which serve as phase stabilizers and/or co-solvents.
  • materials which serve as phase stabilizers and/or co-solvents are C 1 -C 3 alcohols such as methanol, ethanol and propanol.
  • C 1 -C 3 alkanolamines such as mono-, di- and triethanolamines can also be used, by themselves or in combination with the alcohols.
  • the phase stabilizers and/or co-solvents can, for example, constitute 0 to 1 wt%, preferably 0.1 to 0.5 wt%, of the composition.
  • compositions may optionally comprise components which adjust or maintain the pH of the compositions at optimum levels.
  • the pH may be from, for example, 1 to 13, such as 8 to 11 depending on the nature of the composition.
  • a dishwashing composition desirably has a pH of 8 to 11
  • a laundry composition desirable has a pH of 7 to 9
  • a water-softening composition desirably has a pH of 7 to 9.
  • pH adjusting agents are NaOH and citric acid.
  • dish washing formulations are preferred which are adapted to be used in automatic dish washing machines. Due to their specific requirements specialised formulation is required and these are illustrated below
  • Amounts of the ingredients can vary within wide ranges, however preferred automatic dishwashing detergent compositions herein (which typically have a 1% aqueous solution pH of above 8, more preferably from 9.5 to 12, most preferably from 9.5 to 10.5) are those wherein there is present: from 5% to 90%, preferably from 5% to 75%, of builder; from 0.1% to 40%, preferably from 0.5% to 30%, of bleaching agent; from 0.1% to 15%, preferably from 0.2% to 10%, of the surfactant system; from 0.0001% to 1%, preferably from 0.001% to 0.05%, of a metal-containing bleach catalyst; and from 0.1% to 40%, preferably from 0.1% to 20% of a water-soluble silicate.
  • Such fully-formulated embodiments typically further comprise from 0.1% to 15% of a polymeric dispersant, from 0.01% to 10% of a chelant, and from 0.00001% to 10% of a detersive enzyme, though further additional or adjunct ingredients may be present.
  • Detergent compositions herein in granular form typically limit water content, for example to less than 7% free water, for better storage stability.
  • Non-ionic surfactants useful in ADW (Automatic Dish Washing) compositions of the present invention desirably include surfactant(s) at levels of from 2% to 60% of the composition.
  • surfactant(s) at levels of from 2% to 60% of the composition.
  • bleach-stable surfactants are preferred.
  • Non-ionic surfactants generally are well known, being described in more detail in Kirk Othmer's Encyclopedia of Chemical Technology, 3rd Ed., Vol. 22, pp. 360-379, "Surfactants and Detersive Systems", incorporated by reference herein.
  • the ADW composition comprises at least one non-ionic surfactant.
  • non-ionics are ethoxylated non-ionic surfactants prepared by the reaction of a monohydroxy alkanol or alkylphenol with 6 to 20 carbon atoms with preferably at least 12 moles particularly preferred at least 16 moles, and still more preferred at least 20 moles of ethylene oxide per mole of alcohol or alkylphenol.
  • non-ionic surfactants are the non-ionic from a linear chain fatty alcohol with 16-20 carbon atoms and at least 12 moles particularly preferred at least 16 and still more preferred at least 20 moles of ethylene oxide per mole of alcohol.
  • the non-ionic surfactant additionally comprise propylene oxide units in the molecule.
  • this PO units constitute up to 25% by weight, preferably up to 20% by weight and still more preferably up to 15% by weight of the overall molecular weight of the non-ionic surfactant.
  • Particularly preferred surfactants are ethoxylated monohydroxy alkanols or alkylphenols, which additionally comprises polyoxyethylene-polyoxypropylene block copolymer units.
  • the alcohol or alkylphenol portion of such surfactants constitutes more than 30%, preferably more than 50%, more preferably more than 70% by weight of the overall molecular weight of the non-ionic surfactant.
  • Another class of non-ionic surfactants includes reverse block copolymers of polyoxyethylene and polyoxypropylene and block copolymers of polyoxyethylene and polyoxypropylene initiated with trimethylolpropane.
  • R 1 O[CH 2 CH(CH 3 )O] x [CH 2 CH 2 O] y [CH 2 CH(OH)R 2 ]
  • R 1 represents a linear or branched chain aliphatic hydrocarbon group with 4-18 carbon atoms or mixtures thereof
  • R 2 represents a linear or branched chain aliphatic hydrocarbon rest with 2-26 carbon atoms or mixtures thereof
  • x is a value between 0.5 and 1.5
  • y is a value of at least 15.
  • R 1 O[CH 2 CH(R 3 )O] x [CH 2 ] k CH(OH)[CH 2 ] j OR 2 wherein R 1 and R 2 represent linear or branched chain, saturated or unsaturated, aliphatic or aromatic hydrocarbon groups with 1-30 carbon atoms, R 3 represents a hydrogen atom or a methyl, ethyl, n-propyl, iso-propyl, n-butyl, 2-butyl or 2-methyl-2-butyl group , x is a value between 1 and 30 and, k and j are values between 1 and 12, preferably between 1 and 5.
  • R 1 and R 2 are preferably linear or branched chain, saturated or unsaturated, aliphatic or aromatic hydrocarbon groups with 6-22 carbon atoms, where group with 8 to 18 carbon atoms are particularly preferred.
  • group R 3 H methyl or ethyl are particularly preferred.
  • Particularly preferred values for x are comprised between 1 and 20, preferably between 6 and 15.
  • each R 3 in the formula can be different.
  • the value 3 for x is only an example and bigger values can be chosen whereby a higher number of variations of (EO) or (PO) units would arise.
  • mixtures of different non-ionic surfactants is particularly preferred in ADW formulations for example mixtures of alkoxylated alcohols and hydroxy group containing alkoxylated alcohols.
  • composition such as a washing composition within the container, capsule or receptacle part, or within a compartment thereof if there is more than one compartment, need not be uniform.
  • a settable agent for example a gel, useful in a washing process, and then with a different material.
  • the first material could dissolve slowly in the washing process so as to deliver its charge over a long period within the washing process. This might be useful, for example, to provide delayed or sustained delivery of a softening agent in a clothes washing capsule.
  • the composition such as a washing composition may, especially for dishwashing or laundry, include a tablet.
  • a tablet contains a material useful in a washing process and is formulated to provide slow release of that material during a washing process and/or delayed release thereof. Delayed release may be achieved by providing the tablet with a coating which is slow to dissolve during the washing process.
  • the tablet may provide a quick release of components required early in the wash, for example water-softening components and/or enzymes.
  • the tablet may, for example, comprise a disrupting agent, such as one which effervesces when in contact with water such as a combination of citric acid and an alkali metal carbonate or bicarbonate.
  • a tablet may be provided in the main volume of the receptacle part or may be provided in an outwardly facing opening or depression, as previously described.
  • a washing capsule of the invention When a washing capsule of the invention has a tablet retained in an outwardly facing opening or depression the tablet is preferably one which will not transfer any washing composition to the hands of a user.
  • the tablet may be coated with a soluble polymeric material. As mentioned above, this may also be desirable for delayed release of its charge. If it is desired that the tablet dissolves quickly it may, for example, comprise a disrupting agent such as an effervescing agent.

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Claims (37)

  1. Starrer, wasserlöslicher Behälter, der vollständig oder teilweise aus einem spritzgegossenen, wasserlöslichen Polymer hergestellt ist, wobei das Polymer beim Lösen in Wasser reinigungsaktiv ist, wobei im Behälter eine Gewebepflege-, Oberflächenpflege- oder Geschirrspülzusammensetzung vorliegt, mit der Maßgabe, dass das Polymer kein Poly(vinylalkohol) ist.
  2. Starrer, wasserlöslicher Behälter nach Anspruch 1, der vollständig oder teilweise aus einem spritzgegossenen, wasserlöslichen Polymer hergestellt ist, wobei das Polymer beim Lösen in Wasser als Wasserenthärter oder als Farbstoffübettragungshemmstoff aktiv ist.
  3. Starrer, wasserlöslicher Behälter nach Anspruch 2, der vollständig oder teilweise aus einem spritzgegossenen, wasserlöslichen Polymer hergestellt ist, wobei das Polymer Poly(vinylpyrrolidon), Poly(acrylsäure) oder ein Ester davon oder Poly(maleinsäure) oder ein Ester davon oder ein Copolymer von einem davon ist.
  4. Starrer, wasserlöslicher Behälter, der aus mindestens zwei wasserlöslichen spritzgegossenen Polymeren, einem ersten Polymer, ausgewählt ist aus Poly(vinylalkohol), einem Cellulosederivat und Poly(glycolid), Poly(glycolsäure), Poly(lactid), Poly(milchsäure) oder einem Copolymer von einem beliebigen davon, und einem zweiten wasserlöslichen Polymer, hergestellt ist, wobei das Polymer beim Lösen in Wasser reinigungsaktiv ist.
  5. Starrer, wasserlöslicher Behälter nach Anspruch 4, wobei das erste Polymer und das (die) zusätzlichen Polymer(e) gleichzeitig oder nacheinander spritzgegossen werden.
  6. Starrer, wasserlöslicher Behälter nach einem der vorangehenden Ansprüche, der zwei oder mehrere Abteilungen aufweist.
  7. Starrer, wasserlöslicher Behälter nach einem der vorangehenden Ansprüche, der ein Polymer, ausgewählt aus mindestens einem von Folgendem umfasst: Poly(vinylpyrrolidon), Poly(acrylsäure) oder einen Ester davon oder Poly(maleinsäure) oder einen Ester davon oder ein Copolymer von einem beliebigen davon.
  8. Starrer, wasserlöslicher Behälter nach einem der vorangehenden Ansprüche, wobei der Behälter aus einem wasserlöslichen Aufnahmeteil hergestellt und mit einem wasserlöslichen Verschlussteil vorzugsweise in Form einer Folie oder eines spritzgegossenen, starren Verschlusses versiegelt ist.
  9. Starrer, wasserlöslicher Behälter nach Anspruch 8, wobei das Verschlussteil eine Poly(vinylalkohol)-Folie oder einen Poly(vinylalkohol)-Verschluss umfasst.
  10. Anspruch 8 oder 8, wobei das Aufnahmeteil Seitenwände aufweist, die an ihrem oberen Ende in einem Auswärtsflansch enden, an welchem das Verschlussteil abdichtend befestigt ist.
  11. Starrer, wasserlöslicher Behälter nach Anspruch 8, wobei das Verschlussteil eine Kunststofffolie ist.
  12. Starrer, wasserlöslicher Behälter nach einem der vorangehenden Ansprüche, wobei die Zusammensetzung ein Pulver, ein Gel oder eine Paste oder eine Formulierung mit geringem Wassergehalt umfasst.
  13. Starrer, wasserlöslicher Behälter nach einem der Ansprüche 10 bis 12, wobei der Behälter eine Tablette umfasst, die zur verzögerten und/oder anhaltenden Freisetzung eines Materials formuliert ist.
  14. Starrer, wasserlöslicher Behälter nach Anspruch 8, wobei das Aufnahmeteil zwei oder mehrere Abteilungen definiert und mindestens eine Abteilung vollständig oder teilweise aus einem wasserlöslichen Polymer hergestellt ist, das beim Lösen in Wasser reinigungsaktiv ist.
  15. Starrer, wasserlöslicher Behälter nach Anspruch 14, wobei das Aufnahmeteil eine aufrechte Wand aufweist, die die Abteilungen davon voneinander trennt.
  16. Starrer, wasserlöslicher Behälter nach Anspruch 14, wobei das reinigungsaktive Polymer ausgewählt ist aus mindestens einem von Folgendem: Poly(vinylpyrrolidon), Poly(acrylsäure) oder einen Ester davon oder Poly(maleirsäure) oder einen Ester davon oder ein Copolymer von einem beliebigen davon.
  17. Starrer, wasserlöslicher Behälter nach Anspruch 6, wobei eine erste Abteilung vollständig oder teilweise aus einem Polymer hergestellt ist, das beim Lösen in Wasser reinigungsaktiv ist.
  18. Starrer, wasserlöslicher Behälter nach Anspruch 14, wobei mindestens eine Abteilung zumindest teilweise aus Poly(vinylalkohol), einem Cellulosederivat, vorzugsweise einer Ether- oder Hydroxypropylmethylcellulose, und Poly(glycolid), Poly(glycolsäure), Poly(lactid), Poly(milchsäure) oder einem Copolymer von einem beliebigen davon hergestellt ist.
  19. Starrer, wasserlöslicher Behälter nach Anspruch 18, wobei das zweite Polymer Poly(vinylalkohol) ist.
  20. Starrer, wasserlöslicher Behälter nach Anspruch 18 oder 19, wobei sich eine erste Abteilung mit einer anderen Geschwindigkeit in Wasser löst, als eine zweite Abteilung.
  21. Starrer, wasserlöslicher Behälter nach einem der Ansprüche 8 bis 11, wobei das Aufnahmeteil eine nach auswärts gerichtete Öffnung umfasst, in welche eine Tablette eingepresst ist.
  22. Starrer, wasserlöslicher Behälter nach einem der Ansprüche 8 bis 30, wobei das Verschlussteil ein durchsichtiges oder lichtdurchlässiges Material ist.
  23. Starrer, wasserlöslicher Behälter nach einem der Ansprüche 1 bis 22, der vollständig oder teilweise aus Polyvinylpyrrolidin hergestellt ist.
  24. Anordnung aus starren, wasserlöslichen Waschbehältem wie in einem der Ansprüch.e 1 bis 23 definiert, die miteinander verbunden, jedoch zur Verwendung voneinander leicht trennbar sind.
  25. Anordnung nach Anspruch 24, wobei die Anordnung eine sich zwischen den Kapseln erstreckende Symmetrielinie aufweist und die beiden Hälften der Anordnung um die Symmetrielinie gefaltet ist, wobei sich die Verschlussteile in einander zugewandtem Kontakt befinden.
  26. Verfahren zur Herstellung einer wie in Anspruch 24 oder 25 definierten Anordnung, wobei das Verfahren Folgendes umfasst: Formen einer Anordnung von Aufnahmeteilen, wobei jedes Aufnahmeteil mit benachbarten Aufnahmeteilen verbunden, jedoch durch eine Knick- oder Reißhandlung von ihnen trennbar ist; Füllen der Aufnahmeteile mit Waschzusammensetzung; und abdichtendea Befestigen einer Lage aus einem wasserlöslichen Polymer auf dem oberen Teil der Anordnung, um die Verschlussteile für die gesamten Aufnahmeteile der Anordnung zu bilden.
  27. Verfahren zur Herstellung eines wie in einem der Ansprüche 1 bis 23 beanspruchter.' Behälters, das das Schmelzen des Polymers bzw. der Polymere, Spritzen des geschmolzenen Polymers bzw. der geschmolzenen Polymere in eine Gussform, Entfernen des starren, wasserlöslichen Behälters aus der Gussform und Einfüllen der Gewebepflege-, Oberflächenpflege- oder Geschirrspülzusammensetzung in den Behälter umfasst.
  28. Verfahren nach Anspruch 27, wobei ein erstes Polymer und (ein) zusätzliche(s) Polymer(e) gleichzeitig oder nacheinander in die Gussform gespritzt werden.
  29. Verfahren nach Anspruch 28, wobei das erste Polymer und das (die) zusätzliche(n) Polymer(e) nacheinander in beliebiger Reihenfolge durch eine der folgenden Teehnilcen: Multilcomponentenspritzguss oder Sandwichspritzguss, in die Gussform gespritzt werden.
  30. Verfahren nach Anspruch 29, wobei das erste Polymer und das (die) zusätzliche(n) Polymer(e) nacheinander in beliebiger Reihenfolge in die Gussform gespritzt werden, indem ein Polymer oder geschmolzenes Polymergemisch in eine Gussform spritzgegossen wird, das feste Polymer entfernt und in eine zweite Gussform eingesetzt wird und ein zweites Polymer oder Polymergemisch in die zweite Gussform spritzgegossen wird.
  31. Verfahren nach Anspruch 29, wobei das erste Polymer und das (die) zusätzliche(n) Polymer(e) nacheinander in beliebiger Reihenfolge in die Gussform gespritzt werden, indem ein Polymer oder geschmolzenes Polymergemisch in einen Teil einer Gussform spritzgegossen wird, ein zweites Polymer oder geschmolze:nes Polymergemisch in einen weiteren Teil der Gussform spritzgegossen wird.
  32. Verfahren nach Anspruch 29, wobei das erste Polymer und das (die) zusätzliche(n) Polymer(e) gleichzeitig als geschmolzenes Gemisch in die Gussform spritzgegossen werden,
  33. Verfahren nach einem der Ansprüche 27 bis 32, umfassend den zusätzlichen Schritt des Versiegelns des Behälters.
  34. Starrer, wasserlöslicher Behälter, der vollständig oder teilweise aus einem spritzgegossenen, wasserlöslichen Polymer hergestellt ist, wobei im Behälter eine Gewebepflege-, Oberflächenpflege- oder Geschirrspülzusammensetzung vorliegt, und der ein zweites wasserlösliches Polymer aufweist, das an die Innenseite oder Außenseite des Behälters gebunden oder im Behälter eingeschlossen ist und beim Lösen in Wasser reinigungsaktiv ist.
  35. Starrer, wasserlöslicher Behälter nach Anspruch 34, wobei das zweite Polymer Polyvinylpyrrolidin, Polyacrylasäure oder ein Ester davon, Polymaleinsäure oder ein Ester davon oder ein Copolymer von einem beliebigen davon ist.
  36. Starrer, wasserlöslicher Behälter nach einem der Ansprüche 34 oder 35, wobei das zweite Polymer in Form eines Formkörpers vorliegt.
  37. Starrer, wasserlöslicher Behälter nach einem der Ansprüche 34 bis 36, wobei der Behälter vollständig oder teilweise aus Poly(vinylalkohol) hergestellt ist.
EP02727721A 2001-05-17 2002-05-16 Spritzgegossener behälter Revoked EP1390270B1 (de)

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GB0112048 2001-05-17
GB0112048A GB2375542A (en) 2001-05-17 2001-05-17 Water soluble container
PCT/GB2002/002230 WO2002092454A1 (en) 2001-05-17 2002-05-16 Injection moulded containers

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EP1390270A1 EP1390270A1 (de) 2004-02-25
EP1390270B1 true EP1390270B1 (de) 2006-08-16

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EP (1) EP1390270B1 (de)
AT (1) ATE336439T1 (de)
DE (1) DE60213971T2 (de)
ES (1) ES2268025T3 (de)
GB (1) GB2375542A (de)
WO (1) WO2002092454A1 (de)

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GB0112048D0 (en) 2001-07-11
US20060016716A1 (en) 2006-01-26
EP1390270A1 (de) 2004-02-25
DE60213971D1 (de) 2007-03-22
ATE336439T1 (de) 2006-09-15
US20060016715A1 (en) 2006-01-26
US20060016714A1 (en) 2006-01-26
GB2375542A (en) 2002-11-20
DE60213971T2 (de) 2007-05-10
US20040129597A1 (en) 2004-07-08
WO2002092454A1 (en) 2002-11-21

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